Ratios Between Decay Widths of Exotic Doubly Heavy Hadrons in the Diquark Model

At present, exotic hadrons with hidden charm and beauty, interpreted as tetra- and pentaquarks, have been experimentally discovered. Within the quark-diquark model of hadrons, the dynamics of these resonances is reduced to the interaction of a diquark and antidiquark in tetraquarks and a pair of diquarks and an antiquark in pentaquarks. Within this model, the ratios of the widths of quarkonium decay modes to decays with the production of a pair of hadrons with an open flavor for doubly heavy tetra- and pentaquarks with hidden charm have been obtained and discussed.